基于轨迹优化及牵制一致性算法的海上风电场频率控制方法OA

There is a significant difference in wind speed within offshore wind farms,making signal measurement and transmission difficult and costly,which poses challenges to frequency control of wind farms.Therefore,a frequency control method for the offshore wind farm based on trajectory optimization and pinning consensus algorithm is proposed.Firstly,the principles of pinning consensus(PC)algorithm are discussed.A scheme is proposed to generate pinning signals from virtual leadership nodes and achieve optimal control of wind farm power by optimizing the pinning signals.A general form of the pinning signal function is designed based on the adjustable rotor kinetic energy of the wind turbine and the frequency variation law after disturbance.Subsequently,by taking into account the PC control,a single-machine equivalent model of the wind farm is constructed.It is pointed out that due to the consensus of the dynamic behavior of wind turbines in the field,the single-machine equivalent model of the wind farm has good accuracy and can meet the accuracy requirements of system frequency calculation.Finally,with the goal of control costs and considering frequency safety constraints,the coordinated optimization of control measures such as wind power,energy storage,and demand response is carried out to determine the coordinated optimization frequency control scheme and the optimal pinning signal for the wind farm.To verify the effectiveness of the proposed method,it is applied to the frequency control decision of a modified IEEE 3-machine 9-bus system.Simulation results show that optimizing wind power can be achieved by adjusting the pinning signal,reducing control costs while ensuring frequency safety.This method requires less signal measurement and communication,and has a fast calculation speed.